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linux/sound/soc/sh/siu_pcm.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

616 lines
16 KiB
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/*
* siu_pcm.c - ALSA driver for Renesas SH7343, SH7722 SIU peripheral.
*
* Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
* Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc-dai.h>
#include <asm/dmaengine.h>
#include <asm/siu.h>
#include "siu.h"
#define GET_MAX_PERIODS(buf_bytes, period_bytes) \
((buf_bytes) / (period_bytes))
#define PERIOD_OFFSET(buf_addr, period_num, period_bytes) \
((buf_addr) + ((period_num) * (period_bytes)))
#define RWF_STM_RD 0x01 /* Read in progress */
#define RWF_STM_WT 0x02 /* Write in progress */
struct siu_port *siu_ports[SIU_PORT_NUM];
/* transfersize is number of u32 dma transfers per period */
static int siu_pcm_stmwrite_stop(struct siu_port *port_info)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_stream *siu_stream = &port_info->playback;
u32 stfifo;
if (!siu_stream->rw_flg)
return -EPERM;
/* output FIFO disable */
stfifo = siu_read32(base + SIU_STFIFO);
siu_write32(base + SIU_STFIFO, stfifo & ~0x0c180c18);
pr_debug("%s: STFIFO %x -> %x\n", __func__,
stfifo, stfifo & ~0x0c180c18);
/* during stmwrite clear */
siu_stream->rw_flg = 0;
return 0;
}
static int siu_pcm_stmwrite_start(struct siu_port *port_info)
{
struct siu_stream *siu_stream = &port_info->playback;
if (siu_stream->rw_flg)
return -EPERM;
/* Current period in buffer */
port_info->playback.cur_period = 0;
/* during stmwrite flag set */
siu_stream->rw_flg = RWF_STM_WT;
/* DMA transfer start */
tasklet_schedule(&siu_stream->tasklet);
return 0;
}
static void siu_dma_tx_complete(void *arg)
{
struct siu_stream *siu_stream = arg;
if (!siu_stream->rw_flg)
return;
/* Update completed period count */
if (++siu_stream->cur_period >=
GET_MAX_PERIODS(siu_stream->buf_bytes,
siu_stream->period_bytes))
siu_stream->cur_period = 0;
pr_debug("%s: done period #%d (%u/%u bytes), cookie %d\n",
__func__, siu_stream->cur_period,
siu_stream->cur_period * siu_stream->period_bytes,
siu_stream->buf_bytes, siu_stream->cookie);
tasklet_schedule(&siu_stream->tasklet);
/* Notify alsa: a period is done */
snd_pcm_period_elapsed(siu_stream->substream);
}
static int siu_pcm_wr_set(struct siu_port *port_info,
dma_addr_t buff, u32 size)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_stream *siu_stream = &port_info->playback;
struct snd_pcm_substream *substream = siu_stream->substream;
struct device *dev = substream->pcm->card->dev;
struct dma_async_tx_descriptor *desc;
dma_cookie_t cookie;
struct scatterlist sg;
u32 stfifo;
sg_init_table(&sg, 1);
sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
size, offset_in_page(buff));
sg_dma_address(&sg) = buff;
desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
&sg, 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(dev, "Failed to allocate a dma descriptor\n");
return -ENOMEM;
}
desc->callback = siu_dma_tx_complete;
desc->callback_param = siu_stream;
cookie = desc->tx_submit(desc);
if (cookie < 0) {
dev_err(dev, "Failed to submit a dma transfer\n");
return cookie;
}
siu_stream->tx_desc = desc;
siu_stream->cookie = cookie;
dma_async_issue_pending(siu_stream->chan);
/* only output FIFO enable */
stfifo = siu_read32(base + SIU_STFIFO);
siu_write32(base + SIU_STFIFO, stfifo | (port_info->stfifo & 0x0c180c18));
dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
stfifo, stfifo | (port_info->stfifo & 0x0c180c18));
return 0;
}
static int siu_pcm_rd_set(struct siu_port *port_info,
dma_addr_t buff, size_t size)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_stream *siu_stream = &port_info->capture;
struct snd_pcm_substream *substream = siu_stream->substream;
struct device *dev = substream->pcm->card->dev;
struct dma_async_tx_descriptor *desc;
dma_cookie_t cookie;
struct scatterlist sg;
u32 stfifo;
dev_dbg(dev, "%s: %u@%llx\n", __func__, size, (unsigned long long)buff);
sg_init_table(&sg, 1);
sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
size, offset_in_page(buff));
sg_dma_address(&sg) = buff;
desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
&sg, 1, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(dev, "Failed to allocate dma descriptor\n");
return -ENOMEM;
}
desc->callback = siu_dma_tx_complete;
desc->callback_param = siu_stream;
cookie = desc->tx_submit(desc);
if (cookie < 0) {
dev_err(dev, "Failed to submit dma descriptor\n");
return cookie;
}
siu_stream->tx_desc = desc;
siu_stream->cookie = cookie;
dma_async_issue_pending(siu_stream->chan);
/* only input FIFO enable */
stfifo = siu_read32(base + SIU_STFIFO);
siu_write32(base + SIU_STFIFO, siu_read32(base + SIU_STFIFO) |
(port_info->stfifo & 0x13071307));
dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
stfifo, stfifo | (port_info->stfifo & 0x13071307));
return 0;
}
static void siu_io_tasklet(unsigned long data)
{
struct siu_stream *siu_stream = (struct siu_stream *)data;
struct snd_pcm_substream *substream = siu_stream->substream;
struct device *dev = substream->pcm->card->dev;
struct snd_pcm_runtime *rt = substream->runtime;
struct siu_port *port_info = siu_port_info(substream);
dev_dbg(dev, "%s: flags %x\n", __func__, siu_stream->rw_flg);
if (!siu_stream->rw_flg) {
dev_dbg(dev, "%s: stream inactive\n", __func__);
return;
}
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
dma_addr_t buff;
size_t count;
u8 *virt;
buff = (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
siu_stream->cur_period,
siu_stream->period_bytes);
virt = PERIOD_OFFSET(rt->dma_area,
siu_stream->cur_period,
siu_stream->period_bytes);
count = siu_stream->period_bytes;
/* DMA transfer start */
siu_pcm_rd_set(port_info, buff, count);
} else {
siu_pcm_wr_set(port_info,
(dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
siu_stream->cur_period,
siu_stream->period_bytes),
siu_stream->period_bytes);
}
}
/* Capture */
static int siu_pcm_stmread_start(struct siu_port *port_info)
{
struct siu_stream *siu_stream = &port_info->capture;
if (siu_stream->xfer_cnt > 0x1000000)
return -EINVAL;
if (siu_stream->rw_flg)
return -EPERM;
/* Current period in buffer */
siu_stream->cur_period = 0;
/* during stmread flag set */
siu_stream->rw_flg = RWF_STM_RD;
tasklet_schedule(&siu_stream->tasklet);
return 0;
}
static int siu_pcm_stmread_stop(struct siu_port *port_info)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_stream *siu_stream = &port_info->capture;
struct device *dev = siu_stream->substream->pcm->card->dev;
u32 stfifo;
if (!siu_stream->rw_flg)
return -EPERM;
/* input FIFO disable */
stfifo = siu_read32(base + SIU_STFIFO);
siu_write32(base + SIU_STFIFO, stfifo & ~0x13071307);
dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
stfifo, stfifo & ~0x13071307);
/* during stmread flag clear */
siu_stream->rw_flg = 0;
return 0;
}
static int siu_pcm_hw_params(struct snd_pcm_substream *ss,
struct snd_pcm_hw_params *hw_params)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct device *dev = ss->pcm->card->dev;
int ret;
dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
ret = snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
if (ret < 0)
dev_err(dev, "snd_pcm_lib_malloc_pages() failed\n");
return ret;
}
static int siu_pcm_hw_free(struct snd_pcm_substream *ss)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct siu_port *port_info = siu_port_info(ss);
struct device *dev = ss->pcm->card->dev;
struct siu_stream *siu_stream;
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_stream = &port_info->playback;
else
siu_stream = &port_info->capture;
dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
return snd_pcm_lib_free_pages(ss);
}
static bool filter(struct dma_chan *chan, void *slave)
{
struct sh_dmae_slave *param = slave;
pr_debug("%s: slave ID %d\n", __func__, param->slave_id);
if (unlikely(param->dma_dev != chan->device->dev))
return false;
chan->private = param;
return true;
}
static int siu_pcm_open(struct snd_pcm_substream *ss)
{
/* Playback / Capture */
struct siu_info *info = siu_i2s_dai.private_data;
struct siu_port *port_info = siu_port_info(ss);
struct siu_stream *siu_stream;
u32 port = info->port_id;
struct siu_platform *pdata = siu_i2s_dai.dev->platform_data;
struct device *dev = ss->pcm->card->dev;
dma_cap_mask_t mask;
struct sh_dmae_slave *param;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dev_dbg(dev, "%s, port=%d@%p\n", __func__, port, port_info);
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) {
siu_stream = &port_info->playback;
param = &siu_stream->param;
param->slave_id = port ? SHDMA_SLAVE_SIUB_TX :
SHDMA_SLAVE_SIUA_TX;
} else {
siu_stream = &port_info->capture;
param = &siu_stream->param;
param->slave_id = port ? SHDMA_SLAVE_SIUB_RX :
SHDMA_SLAVE_SIUA_RX;
}
param->dma_dev = pdata->dma_dev;
/* Get DMA channel */
siu_stream->chan = dma_request_channel(mask, filter, param);
if (!siu_stream->chan) {
dev_err(dev, "DMA channel allocation failed!\n");
return -EBUSY;
}
siu_stream->substream = ss;
return 0;
}
static int siu_pcm_close(struct snd_pcm_substream *ss)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct device *dev = ss->pcm->card->dev;
struct siu_port *port_info = siu_port_info(ss);
struct siu_stream *siu_stream;
dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_stream = &port_info->playback;
else
siu_stream = &port_info->capture;
dma_release_channel(siu_stream->chan);
siu_stream->chan = NULL;
siu_stream->substream = NULL;
return 0;
}
static int siu_pcm_prepare(struct snd_pcm_substream *ss)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct siu_port *port_info = siu_port_info(ss);
struct device *dev = ss->pcm->card->dev;
struct snd_pcm_runtime *rt = ss->runtime;
struct siu_stream *siu_stream;
snd_pcm_sframes_t xfer_cnt;
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_stream = &port_info->playback;
else
siu_stream = &port_info->capture;
rt = siu_stream->substream->runtime;
siu_stream->buf_bytes = snd_pcm_lib_buffer_bytes(ss);
siu_stream->period_bytes = snd_pcm_lib_period_bytes(ss);
dev_dbg(dev, "%s: port=%d, %d channels, period=%u bytes\n", __func__,
info->port_id, rt->channels, siu_stream->period_bytes);
/* We only support buffers that are multiples of the period */
if (siu_stream->buf_bytes % siu_stream->period_bytes) {
dev_err(dev, "%s() - buffer=%d not multiple of period=%d\n",
__func__, siu_stream->buf_bytes,
siu_stream->period_bytes);
return -EINVAL;
}
xfer_cnt = bytes_to_frames(rt, siu_stream->period_bytes);
if (!xfer_cnt || xfer_cnt > 0x1000000)
return -EINVAL;
siu_stream->format = rt->format;
siu_stream->xfer_cnt = xfer_cnt;
dev_dbg(dev, "port=%d buf=%lx buf_bytes=%d period_bytes=%d "
"format=%d channels=%d xfer_cnt=%d\n", info->port_id,
(unsigned long)rt->dma_addr, siu_stream->buf_bytes,
siu_stream->period_bytes,
siu_stream->format, rt->channels, (int)xfer_cnt);
return 0;
}
static int siu_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct device *dev = ss->pcm->card->dev;
struct siu_port *port_info = siu_port_info(ss);
int ret;
dev_dbg(dev, "%s: port=%d@%p, cmd=%d\n", __func__,
info->port_id, port_info, cmd);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
ret = siu_pcm_stmwrite_start(port_info);
else
ret = siu_pcm_stmread_start(port_info);
if (ret < 0)
dev_warn(dev, "%s: start failed on port=%d\n",
__func__, info->port_id);
break;
case SNDRV_PCM_TRIGGER_STOP:
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_pcm_stmwrite_stop(port_info);
else
siu_pcm_stmread_stop(port_info);
ret = 0;
break;
default:
dev_err(dev, "%s() unsupported cmd=%d\n", __func__, cmd);
ret = -EINVAL;
}
return ret;
}
/*
* So far only resolution of one period is supported, subject to extending the
* dmangine API
*/
static snd_pcm_uframes_t siu_pcm_pointer_dma(struct snd_pcm_substream *ss)
{
struct device *dev = ss->pcm->card->dev;
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_port *port_info = siu_port_info(ss);
struct snd_pcm_runtime *rt = ss->runtime;
size_t ptr;
struct siu_stream *siu_stream;
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_stream = &port_info->playback;
else
siu_stream = &port_info->capture;
/*
* ptr is the offset into the buffer where the dma is currently at. We
* check if the dma buffer has just wrapped.
*/
ptr = PERIOD_OFFSET(rt->dma_addr,
siu_stream->cur_period,
siu_stream->period_bytes) - rt->dma_addr;
dev_dbg(dev,
"%s: port=%d, events %x, FSTS %x, xferred %u/%u, cookie %d\n",
__func__, info->port_id, siu_read32(base + SIU_EVNTC),
siu_read32(base + SIU_SBFSTS), ptr, siu_stream->buf_bytes,
siu_stream->cookie);
if (ptr >= siu_stream->buf_bytes)
ptr = 0;
return bytes_to_frames(ss->runtime, ptr);
}
static int siu_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
struct snd_pcm *pcm)
{
/* card->dev == socdev->dev, see snd_soc_new_pcms() */
struct siu_info *info = siu_i2s_dai.private_data;
struct platform_device *pdev = to_platform_device(card->dev);
int ret;
int i;
/* pdev->id selects between SIUA and SIUB */
if (pdev->id < 0 || pdev->id >= SIU_PORT_NUM)
return -EINVAL;
info->port_id = pdev->id;
/*
* While the siu has 2 ports, only one port can be on at a time (only 1
* SPB). So far all the boards using the siu had only one of the ports
* wired to a codec. To simplify things, we only register one port with
* alsa. In case both ports are needed, it should be changed here
*/
for (i = pdev->id; i < pdev->id + 1; i++) {
struct siu_port **port_info = &siu_ports[i];
ret = siu_init_port(i, port_info, card);
if (ret < 0)
return ret;
ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
SNDRV_DMA_TYPE_DEV, NULL,
SIU_BUFFER_BYTES_MAX, SIU_BUFFER_BYTES_MAX);
if (ret < 0) {
dev_err(card->dev,
"snd_pcm_lib_preallocate_pages_for_all() err=%d",
ret);
goto fail;
}
(*port_info)->pcm = pcm;
/* IO tasklets */
tasklet_init(&(*port_info)->playback.tasklet, siu_io_tasklet,
(unsigned long)&(*port_info)->playback);
tasklet_init(&(*port_info)->capture.tasklet, siu_io_tasklet,
(unsigned long)&(*port_info)->capture);
}
dev_info(card->dev, "SuperH SIU driver initialized.\n");
return 0;
fail:
siu_free_port(siu_ports[pdev->id]);
dev_err(card->dev, "SIU: failed to initialize.\n");
return ret;
}
static void siu_pcm_free(struct snd_pcm *pcm)
{
struct platform_device *pdev = to_platform_device(pcm->card->dev);
struct siu_port *port_info = siu_ports[pdev->id];
tasklet_kill(&port_info->capture.tasklet);
tasklet_kill(&port_info->playback.tasklet);
siu_free_port(port_info);
snd_pcm_lib_preallocate_free_for_all(pcm);
dev_dbg(pcm->card->dev, "%s\n", __func__);
}
static struct snd_pcm_ops siu_pcm_ops = {
.open = siu_pcm_open,
.close = siu_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = siu_pcm_hw_params,
.hw_free = siu_pcm_hw_free,
.prepare = siu_pcm_prepare,
.trigger = siu_pcm_trigger,
.pointer = siu_pcm_pointer_dma,
};
struct snd_soc_platform siu_platform = {
.name = "siu-audio",
.pcm_ops = &siu_pcm_ops,
.pcm_new = siu_pcm_new,
.pcm_free = siu_pcm_free,
};
EXPORT_SYMBOL_GPL(siu_platform);
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